EP0964041B1 - Verwendung von Monothiolen als Stabilisatoren in geschmolzenen Haftklebemassen auf der Basis von Naturkautschuk oder Synthesekautschuken - Google Patents
Verwendung von Monothiolen als Stabilisatoren in geschmolzenen Haftklebemassen auf der Basis von Naturkautschuk oder Synthesekautschuken Download PDFInfo
- Publication number
- EP0964041B1 EP0964041B1 EP99110124A EP99110124A EP0964041B1 EP 0964041 B1 EP0964041 B1 EP 0964041B1 EP 99110124 A EP99110124 A EP 99110124A EP 99110124 A EP99110124 A EP 99110124A EP 0964041 B1 EP0964041 B1 EP 0964041B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rubber
- promoters
- stabilizers
- use according
- natural
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J121/00—Adhesives based on unspecified rubbers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/383—Natural or synthetic rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/37—Thiols
- C08K5/378—Thiols containing heterocyclic rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
- C08L2666/04—Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L57/00—Compositions of unspecified polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C08L57/02—Copolymers of mineral oil hydrocarbons
Definitions
- the invention relates to the use of monothiols.
- Pressure sensitive adhesives based on natural rubber / resin mixtures are usually used made in solvents. These are used for the production of adhesive tapes Solutions are applied as a thin layer to the carrier, dried and cut into strips. This requires complex machining processes, expensive explosion-proof Coating and drying systems and costly incineration or Recovery systems.
- Hotmelt PSAs based on natural rubbers therefore have particular advantages or synthetic diene rubbers such as IR and SBR. Because this for the solvent-free processing reduced to a relatively low molecular weight an effective crosslinking process is required after coating. The effectiveness of the radiation crosslinking of these materials can be reduced by small amounts on polyfunctional (meth) acrylates as crosslinking promoters significantly increased become.
- Stabilizing hot melts of polydiene rubbers for hotmelt PSAs is known to be difficult: In the presence of atmospheric oxygen, these masses tend to break down. The known antioxidants are effective against this, but their effect is limited. With longer dwell times, the oxygen must be excluded in order to keep the properties stable. The exclusion can be done by displacing the air with nitrogen, carbon dioxide or the like, or by avoiding air spaces.
- the rubber compounds tend to gel under oxygen-free conditions.
- WO 97/07963 (Munson et al.) Therefore describes the addition of "non-thermosettable Phenolic Tackifying Resins ", which surprisingly coexists with the tackifying Effect also to stabilize the adhesive at high temperatures leads. This applies both to the pure adhesive and to those that increase Bismaleimides had been added to the radiation cross-linkability. The influence on the Adhesive properties, however, limit the free adjustability in the selection and Combination of the adhesive resins.
- the object of the invention was to find additives which, on the one hand, prevent this gelling on the other hand, not the properties of the adhesives, especially theirs Radiation cross-linkability. It was also required that the substances no harmful or disruptive at the required temperatures Emit vapors.
- the object is achieved according to the main claim by the use of solid, rubber-soluble or dispersible monothiols as stabilizers in melted PSAs based on natural rubber or synthetic rubbers, suitable adhesive resins and promoters to increase the radiation crosslinking yield.
- the subclaims relate to particularly advantageous developments of the inventive concept.
- the monothiol is 2-mercapto-benzimidazole or substituted derivatives, in particular 4- (and / or 5) -methyl-2-mercapto-benzimidazole.
- at least one liquid phosphite ester compatible with the rubber can additionally be present.
- the concept of the invention generally comprises a melted pressure-sensitive adhesive based on natural rubber or synthetic rubbers, suitable adhesive resins and promoters for increasing the radiation crosslinking yield, comprising solid rubber-soluble or dispersible monothiols as stabilizers and optionally at least one liquid phosphite ester compatible with the rubber.
- the monothiol used according to the invention is usually used in the rubber industry as a stabilizer and as a retarder during vulcanization with sulfur-containing systems.
- 4- (and / or 5) -methyl-2-mercapto-benzimidazole is available under the name Vulkanox ® MB 2 as an anti-aging agent from Bayer AG, Leverkusen.
- Suggested areas of application for Vulkanox ® MB 2 include mixtures based on natural rubber and synthetic rubber of the types SBR and NBR, in which Vulkanox ® MB 2 shows a protective effect against oxidation and against the harmful consequences of over-vulcanization. This effect as a retarder is linked to sulfur vulcanization.
- the monothiols used according to the invention are effective stabilizers for the adhesives mentioned even with small additions if they contain promoters to increase the radiation crosslinking yield.
- Polyfunctional (meth) acrylates such as hexanediol diacrylate (HDDA), trimethylolpropane triacrylate (TMPTA), pentaerythritol tetraacrylate (PETA) and their ethoxylated or propoxylated or dimerized derivatives are primarily suitable as crosslinking promoters.
- the described effect can be increased by adding phosphite esters become.
- the adhesive masses were formed into spheres of approx. 10 mm and introduced into a cylinder, from which the atmospheric oxygen was then largely eliminated by flushing with nitrogen several times. They were then heated for about 30 minutes at 140 C under a pressure of 3-4 bar nitrogen.
- the adhesive tape samples to be determined were punched out in square pieces of 20 cm 2 and welded into a bag of spunbonded polyethylene (Tyvek from DuPont with a basis weight of approx. 55 g / m 2 ).
- the samples were extracted with toluene for 3 days with shaking. The toluene was changed daily. It was then exchanged for hexane / heptane and dried at about 110 ° C.
- the gel fraction was determined by differential weighing, taking into account extraction losses of the fleece and the carrier.
- Natural rubber SMR CV 50 48.75% Resin 115 ⁇ #> 48.75% phenolic antioxidant ⁇ +> 0.5%
- Ebecryl 160 ⁇ ++> 2.0%
- Polyterpene resin with softening point 115 C) ⁇ +> Ralox 46-P from Raschig AG, Ludwigshafen
- MBI is effective even in very low concentrations and that Efficiency is still significant due to the addition of small amounts of organic phosphites can be increased.
- a two-stage process was used to speed up production: In a first stage, the rubber was kneaded together with the stabilizers and a small amount of adhesive resin in a laboratory internal mixer from Werner & Pfleiderer, Stuttgart, for 4 minutes at 60 rpm. 2 "mill bases" were manufactured with the following composition: Composition of the basic mass mill base Y mill base Z Natural rubber CV 50 90.1% 89.7% Resin 115 9% 9% Colan 46 0.9% 0.9% MBI 0.4%
- this "mill bases” was made in a Werner kneader & Pfleiderer, Stuttgart, preheated at 100 ° C for 20 min. Then the kneading process started and the remaining adhesive resin in portions within about 25 min added and kneaded homogeneously for 20 min. The Ebecryl 160 (20% in Ethyl acetate) was added in portions within 8 minutes and then homogeneously for 15 minutes kneaded.
- compositions thus produced had the following composition: Composition of the masses Mass A Mass B Mass C Mass D Addition (g) Salary (%) Addition (g) Salary (%) Addition (g) Salary (%) Addition (g) Salary (%) mill base Y 324.75 324.75 mill base Z 325.3 323.6 NR CV50 49.7 48.8 48.7 48.4 Resin 115 263.25 49.7 263.25 48.8 262.7 48.6 261.4 48.4 Ebecryl 160 12 2.0 12 2.0 12 2.0 Colan 46 0.5 0.5 0.5 0.5 0.5 MBI 0.2 0.2 Weston 399 3 0.5
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
In Gegenwart von Luftsauerstoff neigen diese Massen zum Abbau. Hiergegen sind die bekannten Antioxidantien wirksam, allerdings ist ihre Wirkung begrenzt.
Bei längeren Verweilzeiten muß der Sauerstoff ausgeschlossen werden, um die Eigenschaften stabil zu erhalten. Der Ausschluß kann durch Verdrängung der Luft durch Stickstoff, Kohlendioxid o.a. erfolgen oder auch durch Vermeidung von Lufträumen.
Gegenstand der Unteransprüche sind besonders vorteilhafte Weiterbildungen des Erfindungsgedankens.
Um die Wirkung der Merkaptane weiter zu steigern, kann zusätzlich mindestens ein flüssiger mit dem Kautschuk verträglicher Phosphit-Ester vorhanden sein.
Schließlich umfaßt der Erfindungsgedanke allgemein eine geschmolzene Haftklebemasse auf der Basis von Naturkautschuk oder Synthesekautschuken, geeigneten Klebharzen und Promotoren zur Erhöhung der Strahlenvemetzungsausbeute, enthaltend feste, in Kautschuk lösliche oder dispergierbare Monothiole als Stabilisatoren und gegebenenfalls zumindest einen flüssigen, mit dem Kautschuk verträglichen Phosphit-Ester.
So ist zum Beispiel das 4-(und/oder 5)-Methyl-2-Merkapto-Benzimidazol unter dem Namen Vulkanox ® MB 2 als Alterungsschutzmittel bei der Firma Bayer AG, Leverkusen, erhältlich. Vorgeschlagen werden als Anwendungsgebiete für Vulkanox ® MB 2 u.a. Mischungen auf Basis von Naturkautschuk und synthetischen Kautschuk vom Typ SBR und NBR, in denen Vulkanox ® MB 2 eine Schutzwirkung gegen Oxidation und gegen die schädlichen Folgen einer Übervulkanisation zeigt. Diese Wirkung als Retarder ist an die Schwefelvulkanisation gebunden.
Als Vernetzungspromotoren sind in erster Linie mehrfunktionelle (Meth)acrylate wie Hexandiol-diacrylat (HDDA), Trimethylolpropan-triacrylat (TMPTA), Pentaerythritol-tetraacrylat (PETA) sowie deren eth- oder propoxylierte oder dimerisierte Derivate geeignet.
Nach dem Erhitzen wurden kleine Mengen der Proben 20 h mit der 20-fachen Menge Toluol geschüttelt und die Gelbildung nach dem in Tabelle 1 genannten Schlüssel beurteilt:
| Schlüssel zur Beurteilung der Gelbildung nach der Erhitzung | |
| 0 | klar löslich, kein Makrogel |
| 1 | geringe Schlieren, sehr wenig Gel |
| 2 | geringe Gelflocken, etwas Gel |
| 3 | deutlich erkennbare Gelflocken |
| 4 | aufgequollener Gelklumpen |
Der Gelanteil wurde durch Differenzwägungen bestimmt, wobei Extraktionsverluste des Vlieses und des Trägers berücksichtigt wurden.
| Naturkautschuk SMR CV 50 | 48,75 % |
| Harz 115 <#> | 48,75 % |
| phenolisches Antioxidant <+> | 0,5 % |
| Ebecryl 160 <++> | 2,0 % |
| Stabilität der Massen nach Erhitzung unter Stickstoff | ||
| Substanz | Konz. (%) | Gelbildung nach Tabelle 1 |
| ohne Zusatz | - | 4 |
| Ralox 46-P 〈1〉 | 2 | 4 |
| Irganox 1010 〈2〉 | 2 | 4 |
| Irganox 1035 〈3〉 | 2 | 4 |
| Weston 399 〈4〉 | 0,5 | 3 |
| Irganox 565 〈5〉 | 2 | 3 |
| Irganox PS 802 〈6〉 | 2 | 3 |
| Lowinox AH 25 〈7〉 | 2 | 3 |
| Weston 399 | 1 | 2 |
| MBI 〈8〉 | 0,2 | 1 |
| Weston 399 | 2 | 1 |
| Weston 399 + MBI | 0,5 + 0,2 | 0 |
| Eingesetzte Substanzen: | ||
| Chemischer Aufbau | Hersteller / Lieferant | |
| 〈1〉 | 2,2'-Methylen-bis(4-methyl-6-tert.butyl-phenol) | Raschig AG, |
| Ludwigshafen | ||
| 〈2〉 | Pentaerythrityl-tetrakis(3,5-di-tert.butyl-4-hydroxy-hydrocinnamate) | Ciba-Geigy, |
| Basel | ||
| 〈3〉 | 2,2'-Thiodiethyl-bis(3,5-di-tert.butyl-4-hydroxy-hydrocinnamate) | Ciba-Geigy, |
| Basel | ||
| 〈4〉 | Tris-(nonylphenyl)-phosphit | Interorgana GmbH, |
| Köln | ||
| 〈5〉 | 4-[(4,6-bis-[oktylthio]-s-triazin-2-yl)amino]-2,6-di-tert.butylphenol | Ciba-Geigy, |
| Basel | ||
| 〈6〉 | β,β'-Thio-di-propionsäure-di-stearylester | Ciba-Geigy, |
| Basel | ||
| 〈7〉 | 2,5-Di-tert.amyl-hydrochinon | Chemische Werke Lowi, |
| Waldkreiburg | ||
| 〈8〉 | Vulkanox MB2/MG 2-Merkapto-4(5)-methyl-benzimidazol (MBI) | Bayer AG, |
| Leverkusen |
In einer ersten Stufe wurde der Kautschuk zusammen mit den Stabilisatoren und einer kleinen Menge Klebharz in einem Labor-Innenmischer der Firma Werner & Pfleiderer, Stuttgart, 4 min bei 60 U/min geknetet. Hergestellt wurden 2 "mill bases" mit folgender Zusammensetzung:
| Zusammensetzung der Grundmasse | ||
| mill base Y | mill base Z | |
| Naturkautschuk CV 50 | 90,1 % | 89,7% |
| Harz 115 | 9% | 9% |
| Colan 46 | 0,9 % | 0,9 % |
| MBI | 0,4 % |
| Zusammensetzung der Massen | ||||||||
| Masse A | Masse B | Masse C | Masse D | |||||
| Zugabe (g) | Gehalt (%) | Zugabe (g) | Gehalt (%) | Zugabe (g) | Gehalt (%) | Zugabe (g) | Gehalt (%) | |
| mill base Y | 324,75 | 324,75 | ||||||
| mill base Z | 325,3 | 323,6 | ||||||
| NR CV50 | 49,7 | 48,8 | 48,7 | 48,4 | ||||
| Harz 115 | 263,25 | 49,7 | 263,25 | 48,8 | 262,7 | 48,6 | 261,4 | 48,4 |
| Ebecryl 160 | 12 | 2,0 | 12 | 2,0 | 12 | 2,0 | ||
| Colan 46 | 0,5 | 0,5 | 0,5 | 0,5 | ||||
| MBI | 0,2 | 0,2 | ||||||
| Weston 399 | 3 | 0,5 |
| Stabilität der Klebmassen | ||||
| Zeit nach dem Zufügen des Ebecryl 160 | Masse A | Masse B | Masse C | Masse D |
| 0 min | 0 | 0 | 0 | 0 |
| 30 min | 4 | 0 | 0 | |
| 60 min | 0 | 4 | 0 | 0 |
| 120 min | 0 | 4 | 0 | 0 |
| 180 min | 0 | 4 | 0 | 0 |
| 240 min | 0 |
Zur Charakterisierung des Vernetzungsgrads wurde der Gelanteil in Toluol nach der o.g. Methode bestimmt. Die Ergebnisse sind in Tabelle 7 zusammengefaßt.
| Gelanteil nach ES-Vernetzung | ||||
| Zusatz | Konzentration (%) | Gelanteil (%) bei 20 kGy | Gelanteil (%) bei 50 kGy | Gelanteil (%) bei 70 kGy |
| ohne | 17,8 | 37,5 | 39,4 | |
| Weston 399 | 2 | 19,8 | 35,9 | 39,9 |
| MBI | 0,5 | 15 | 35,3 | 38,9 |
Claims (6)
- Verwendung von festen, in Kautschuk löslichen oder dispergierbaren Monothiolen als Stabilisatoren in geschmolzenen Haftklebemassen auf der Basis von Naturkautschuk oder Synthesekautschuken, geeigneten Klebharzen und Promotoren zur Erhöhung der Strahlenvernetzungsausbeute.
- Verwendung nach Anspruch 1 dadurch gekennzeichnet, daß das Monothiol 2-Merkapto-Benzimidazol oder ein substituiertes Derivat ist.
- Verwendung nach Anspruch 2, dadurch gekennzeichnet, daß das substituierte Derivat 4-(und/oder 5)-Methyl-2-Merkapto-Benzimidazol ist.
- Verwendung nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß als Vernetzungspromotoren mehrfunktionelle (Meth)acrylate wie Hexandiol-diacrylat (HDDA), Trimethylolpropan-triacrylat (TMPTA), Pentaerythritol-tetraacrylat (PETA) sowie deren eth- oder propoxylierte oder dimerisierte Derivate eingesetzt werden.
- Verwendung nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß zusätzlich mindestens ein flüssiger mit dem Kautschuk verträglicher Phosphit-Ester vorhanden ist.
- Geschmolzene Haftklebemasse auf der Basis von Naturkautschuk oder Synthesekautschuken, geeigneten Klebharzen und Promotoren zur Erhöhung der Strahlenvernetzungsausbeute, enthaltend feste, in Kautschuk lösliche oder dispergierbare Monothiole als Stabilisatoren und gegebenenfalls zumindest einen flüssigen, mit dem Kautschuk verträglichen Phosphit-Ester.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19826103 | 1998-06-12 | ||
| DE19826103A DE19826103A1 (de) | 1998-06-12 | 1998-06-12 | Verwendung von Monothiolen als Stabilisatoren in geschmolzenen Haftklebemassen auf der Basis von Naturkautschuk oder Synthesekautschuken |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0964041A1 EP0964041A1 (de) | 1999-12-15 |
| EP0964041B1 true EP0964041B1 (de) | 2003-08-06 |
Family
ID=7870631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99110124A Expired - Lifetime EP0964041B1 (de) | 1998-06-12 | 1999-05-25 | Verwendung von Monothiolen als Stabilisatoren in geschmolzenen Haftklebemassen auf der Basis von Naturkautschuk oder Synthesekautschuken |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6294598B1 (de) |
| EP (1) | EP0964041B1 (de) |
| JP (1) | JP2000026820A (de) |
| DE (2) | DE19826103A1 (de) |
| ES (1) | ES2204030T3 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10039212A1 (de) * | 2000-08-11 | 2002-02-21 | Tesa Ag | Verfahren zur Herstellung haftklebriger Polyacrylate unter Verwendung mercaptofunktionalisierter Photoinitiatoren |
| CA2414719C (en) * | 2001-12-21 | 2009-07-21 | Dainippon Ink And Chemicals, Inc. | Curable resin compositions and process for preparing oligomers containing acrylate groups and substituted methacrylate groups |
| WO2003083001A1 (en) * | 2002-03-28 | 2003-10-09 | Toppan Forms Co., Ltd. | Radiation hardenable adhesive composition containing dispersed natural rubber fine particles |
| DE10259682B4 (de) * | 2002-12-18 | 2016-01-14 | Coroplast Fritz Müller Gmbh & Co. Kg | Auf sich selbst wickelbares Klebeband und seine Verwendung |
| DE102008014392A1 (de) * | 2008-03-17 | 2009-09-24 | Tesa Se | Verwendung von schwefelhaltigen oder phosphorhaltigen Alterungsschutzmitteln in einer naturkautschukbasierenden Klebemasse |
| CN102844060A (zh) | 2010-03-30 | 2012-12-26 | 犹诺医药有限公司 | 医疗装置 |
| KR102112666B1 (ko) * | 2017-12-29 | 2020-05-20 | (주)케이비어드히시브스 | 내열성 고무계 점착제 조성물 및 이를 포함하는 내열성 점착 테이프 |
| JP7106876B2 (ja) * | 2018-01-31 | 2022-07-27 | 横浜ゴム株式会社 | 金属接着用ゴム組成物およびそれを用いた空気入りタイヤ |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2285428A1 (fr) * | 1974-09-20 | 1976-04-16 | Ugine Kuhlmann | Procede pour la protection des vulcanisats a base de caoutchouc naturel ou synthetique contre les agents atmospheriques |
| JPS55131075A (en) * | 1979-03-31 | 1980-10-11 | Nitto Electric Ind Co Ltd | Adhesive tape |
| JPS58183740A (ja) * | 1982-04-21 | 1983-10-27 | Tatsuta Electric Wire & Cable Co Ltd | 耐熱性自己融着架橋ポリオレフインテ−プ用組成物 |
| US4946879A (en) * | 1987-03-03 | 1990-08-07 | The Goodyear Tire & Rubber Company | Reaction product of a rosin acid and an antidegradant |
| CA2023097C (en) * | 1990-01-16 | 1999-07-06 | Kenji Tsubota | Method for producing an air-permeable adhesive tape |
| DE69307008T2 (de) * | 1992-03-27 | 1997-04-17 | Nitto Denko Corp | Druckempfindliche Klebstoffe mit guter Wärmebeständigkeit, Klebplatten daraus und Verfahren zur deren Herstellung |
| US5914157A (en) * | 1995-08-31 | 1999-06-22 | Minnesota Mining And Manufacturing Company | Solventless hot melt process for the preparation of pressure sensitive adhesives |
| US6132761A (en) * | 1997-09-05 | 2000-10-17 | Nitto Denko Corporation | Percutaneous absorption preparation |
-
1998
- 1998-06-12 DE DE19826103A patent/DE19826103A1/de not_active Ceased
-
1999
- 1999-05-25 EP EP99110124A patent/EP0964041B1/de not_active Expired - Lifetime
- 1999-05-25 DE DE59906480T patent/DE59906480D1/de not_active Expired - Lifetime
- 1999-05-25 ES ES99110124T patent/ES2204030T3/es not_active Expired - Lifetime
- 1999-06-04 JP JP11158105A patent/JP2000026820A/ja active Pending
- 1999-06-08 US US09/328,286 patent/US6294598B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000026820A (ja) | 2000-01-25 |
| DE59906480D1 (de) | 2003-09-11 |
| DE19826103A1 (de) | 1999-12-16 |
| EP0964041A1 (de) | 1999-12-15 |
| US6294598B1 (en) | 2001-09-25 |
| ES2204030T3 (es) | 2004-04-16 |
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